The team, comprising over a dozen plain clothes and uniformed police personnel, arrived at the office tower here at around 10.45am on Thursday (May 23) in three unmarked police cars before making their way to the offices on the 16th floor.

Several police personnel could be seen walking in and out of the lobby of the building to where their vehicles were parked.

Deloitte is believed to be the first firm to be raided by Federal police in its investigations into the 1Malaysia Development Berhad (1MDB) scandal.

It is among the "Big Four" international accounting companies that include Ernst and Young, KPMG and PricewaterhouseCoopers.

Deloitte was appointed the auditor for 1MDB Real Estate Sdn Bhd between Mac 31, 2015 and 2016.